Differences

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--- ssh [May 14, 2026 at 11:38] – external edit 127.0.0.1
+++ ssh [August 22, 2026 at 15:22] (current) – external edit 127.0.0.1
@@ Line 1: / Line 1: @@
 # SSH
-## What is ssh?
-**SSH (Secure shell)** is a tool that allows you to remotely control another computer from your own.
+**SSH (Secure Shell)** lets you securely connect to remote computers and run commands. Authentication uses passwords or public-key cryptography. Transfer files securely with `scp` or `rsync`. Tunnel arbitrary traffic through SSH connections for security and access through firewalls.
-## Login without password
+SSH is the standard for remote system administration, development on servers, and secure file transfer. Every modern system runs an SSH server. Client tools: `ssh` (connect), `scp` (copy files), `ssh-keygen` (generate keys), `ssh-add` (manage keys).
-On the client, you should run the following command:
-```
-ssh-keyring
-```
-This command is going to generate two files in your `~/.ssh` directory: `id_ed25519.pub` and `id_ed25519`. This is your public/private key pair.
+```bash
-```
+$ ssh user@host                 # connect to remote host
-Generating public/private ed25519 key pair.
+$ ssh -i key.pem user@host     # use specific private key
-Enter file in which to save the key (/home/user/.ssh/id_ed25519):
+$ scp file user@host:/path     # copy file to remote
-Enter passphrase for "id_ed25519" (empty for no passphrase):
+$ ssh-keygen -t ed25519         # generate key pair
-Enter same passphrase again:
 ```
-After it's done, you should see something like this:
+Public-key authentication is more secure than passwords. Generate a key pair, copy the public key to the server, and SSH uses it for authentication. You can also configure SSH tunneling, jump hosts, and multiplexing for advanced usage.
-```
-Your identification has been saved in id_ed25519
-Your public key has been saved in id_ed25519.pub
-The key fingerprint is:
-SHA256:A9XgEuUAq5PT+TydcezaAL2iZCAWkOZLSsYjnR1rct4 user@client
-The key's randomart image is:
-+--[ED25519 256]--+
-|..  ..o.+o       |
-|o.  .. *  .      |
-|+o o.oo o        |
-|.B=+=. + .       |
-|B.O=o.. S o      |
-|oo +.oEo B       |
-|    o = = .      |
-|   o . o +       |
-|    .   . .      |
-+----[SHA256]-----+
-```
-### Server: Append the public key to authorized_keys
-## Links
+## Concepts
- - https://man.openbsd.org/ssh-keygen.1
+. [[ssh-basics|Basics]]
+. [[ssh-key-generation|Key generation]]
+. [[ssh-configuration|Configuration]]
+. [[ssh-authentication|Authentication]]
+. [[ssh-port-forwarding|Port forwarding]]
+. [[ssh-copy-and-sync|Copy and sync]]
+. [[ssh-jump-hosts|Jump hosts]]
+. [[ssh-multiplexing|Multiplexing]]
+. [[ssh-agents|Agents]]
+. [[ssh-security|Security]]
+. [[ssh-server-configuration|Server configuration]]
+. [[ssh-troubleshooting|Troubleshooting]]